Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2cf691add3854ea…

MALICIOUS

PDF

90.0 KB Created: 2021-09-06 15:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a03dc3d6c82cf129017a6b5fba13060d SHA-1: 6ee537c9d85afed0bce1bbd95b57b6ba39b44ca3 SHA-256: f2cf691add3854eac9ef3c76c868c509665dcab017891d30a9827b255bc471d5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://everbeenmagnet.com/js/upfiles/files/99101369535.pdf In PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf623a9d75---vamixewejejimome.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/selogufelazameg.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/gisufitorajegomejegetave.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/gilegalogupewus.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/rigurejurosikuwukupaf.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/08/26/jipap.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083e107137db---61096339552.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b006dd9b2c8---47220653498.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/35398748768.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a689bb04---62736850307.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334fb186934---madikupojurexadew.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/82207888592.pdfIn PDF document text
    • http://getvisa.ru/images/File/95780938279.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/kitobuwuruwasaweguxolejil.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/22530405461.pdfIn PDF document text
    • http://hrudolf.com/userfiles/69674221630.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/da9dda2289ffb558555c0743f1dc4edc/xifim.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/mofujazeduvovuruvekupagen.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/np2btjfh5ojmuadul4k0sb68q0/duxulixomamuruviwemada.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/tuxege.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/70750a99640e8557f011dfa1ea3ad5be/salitebivuwazedo.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088dab162a52---22630567582.pdfIn PDF document text
    • http://maydangson.com/vietkiendo/upload/file/84201916457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=properties+of+parallelograms+worksheet+milliken+publishing+company+answers+page+25PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 11712 bytes
SHA-256: df95ed2ac27643250be96243b5b01bf6da2900225d3c0c6c33c23397c232e29a
font_01_sfnt_off000114ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BA 17392 bytes
SHA-256: 87c4efbbba3763bb93a2e3c10061ac9272629968308777708d1becb92ddfadfc
font_02_sfnt_off0001412b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1